The Red Man is a very red, very fat man named Gavin who lives in a room with Colin, the Canned Bum Man. Gavin is described as having a crab brain in a man’s body, is barely human and known for screaming all night (see Episode 3). Colin occasionally sleeps in the folds of Gavin's fat.
In an advert in Episode 26 we hear that the Red Man has been kissing Colin's mum, that in return she loves him and wants the Red Man to be Colin's 'new daddy'.
We hear in Episode 88 that the Red Man grew larger and larger until he popped, leaving a large amount of pus. The pus was then used in Colin's canned bum business.
In Bonus Episode 99 we find out that the Red Man is still very much alive and that his demise was one of Colin’s vivid dreams.